/*
 *  Copyright 2001-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package ar.uba.fi.posgrado.academy.web.action.course;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import ar.uba.fi.posgrado.academy.model.Course;
import ar.uba.fi.posgrado.academy.model.Resolution;
import ar.uba.fi.posgrado.academy.model.Subject;
import ar.uba.fi.posgrado.academy.service.BodyService;
import ar.uba.fi.posgrado.academy.service.CourseService;
import ar.uba.fi.posgrado.academy.service.SubjectService;
import ar.uba.fi.posgrado.academy.web.form.course.CourseForm;
import ar.uba.fi.posgrado.common.exception.RepeatedNameException;
import ar.uba.fi.posgrado.common.util.CommonUtils;

/**
 * Action que crea un {@link Course curso}.<br>
 * 
 * @author ariel.piechotka
 */
public class CreateCourseAction extends Action {
	/** Logger */
	private static Logger logger = Logger.getLogger(CreateCourseAction.class);

	private CourseService courseService;

	private BodyService bodyService;

	private SubjectService subjectService;

	public void setCourseService(CourseService courseService) {
		this.courseService = courseService;
	}

	public void setBodyService(BodyService bodyService) {
		this.bodyService = bodyService;
	}

	public void setSubjectService(SubjectService subjectService) {
		this.subjectService = subjectService;
	}

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm actionForm,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		if (logger.isDebugEnabled())
			logger.debug("Por crear un curso...");

		CourseForm form = (CourseForm) actionForm;

		Course course = new Course();
		course.setCode(form.getCode());
		course.setName(form.getName());
		course.setCurriculum(form.getCurriculum());
		course.setCertificate(form.getCertificate());
		course.setBody(bodyService.getById(form.getIdBody()));
		course.setCourseType(courseService.getCourseTypeById(new Long(request.getParameter("courseType"))));
		course.setFirstDueDate(CommonUtils.toDateFromStringStandard(request.getParameter("firstDueDate")));
		course.setQtyRegistrationFees((byte)0);

		String resolutionNumber = request.getParameter("resolution");
		String fileNumber = request.getParameter("fileNumber");
		if (!resolutionNumber.trim().equals("")
				|| !fileNumber.trim().equals("")) {
			Set<Resolution> resolutions = new HashSet<Resolution>();
			Resolution resolution = new Resolution();
			resolution.setResolutionNumber(resolutionNumber);
			resolution.setFileNumber(fileNumber);
			resolution.setCourse(course);
			resolutions.add(resolution);
			course.setResolutions(resolutions);
		} else
			course.setResolutions(new HashSet<Resolution>());

		List<Long> subjectIds = form.getChosenSubjectsAsList();
		Set<Subject> subjects = new HashSet<Subject>();
		for (Long subjectId : subjectIds)
			subjects.add(subjectService.getById(subjectId));
		course.setSubjects(subjects);

		try {
			this.courseService.create(course);
		} catch (RepeatedNameException e) {
			logger
					.info("Intentando crear un curso con un codigo existente. Devolviendo error...");

			ActionMessages errors = new ActionMessages();
			errors.add("course.code", new ActionMessage(e.getMessage(), false));
			saveErrors(request, errors);
			return mapping.getInputForward();
		}

		logger.info("Curso " + course + " creado con exito");

		return mapping.findForward("success");
	}
}
